Plasmate
When your AI agents browse the web, they're using the same browser you use to watch YouTube. It's like hiring a translator who reads every word in the dictionary before answering a question.
Chrome returns raw HTML: a massive blob of layout code, tracking scripts, ad containers, CSS classes, and SVG paths. Your agent has to process all of it, even though 80-95% of that data is completely irrelevant to what the agent actually needs to know.
This creates three problems:
The cost compounds. If you're running agents that read hundreds or thousands of pages per day, you're paying for a firehose of irrelevant data and the compute to process it.
Plasmate is a browser engine built specifically for AI agents. Instead of returning raw HTML, it compiles pages into structured, semantic output. Only the meaningful content. Only what's actionable.
The output format is called SOM (Semantic Object Model). Think of it as a table of contents for a web page, not the full book with all its margin notes and illustrations.
We tested Plasmate against 98 of the most popular websites on the internet. The results are consistent and dramatic.
Cost to process all 49 benchmark URLs, 1,000 times each:
| LLM Model | With Chrome | With Plasmate | You Save |
|---|---|---|---|
| GPT-4 | $50,397 | $3,042 | $47,355 |
| GPT-4o | $12,599 | $761 | $11,839 |
| Claude Sonnet | $15,119 | $913 | $14,207 |
At enterprise scale (1 million pages per month), Plasmate saves $966/month on GPT-4 input costs alone. Multiply across models, agents, and workflows, and the savings are substantial.
Any workflow where AI agents interact with web content benefits from Plasmate. Here are the highest-impact scenarios:
Monitor competitor pricing, product changes, and content updates across hundreds of URLs. Get structured data instead of HTML soup. Run 50 concurrent sessions per instance.
Agents that browse on behalf of users respond faster and more accurately when they get clean, structured page data instead of raw HTML. Lower latency, better answers.
Pull structured data from thousands of pages per hour. Plasmate's semantic output means your extraction pipeline doesn't need to parse raw HTML or guess at page structure.
Scan regulatory filings, terms of service changes, and legal documents across many sites. Structured output makes diff-detection reliable and auditable.
Analyze page structure, content hierarchy, and link architecture across your properties and competitors. SOM exposes semantic structure that raw HTML obscures.
Agents that fill forms, click buttons, and navigate multi-step workflows perform more reliably when every interactive element is explicitly labeled with its available actions.
Plasmate is designed to work with your existing agent infrastructure. Your team doesn't need to learn a new framework or rewrite their automation.
If your agents already use Puppeteer or Playwright, they can connect to Plasmate with minimal configuration changes. Same API, dramatically better performance.
Claude, GPT, and other MCP-compatible AI assistants can use Plasmate as a tool directly. One line of configuration gives your assistant fast, structured web access.
Native SDKs with full type safety. Your engineering team can integrate Plasmate into any stack in under an hour.
Browser Use and LangChain have published integration guides. If your team uses either framework, Plasmate is a drop-in addition.
The output format (SOM) is an open specification with JSON Schema validation. You're not locked in. If you ever want to switch engines, your downstream code keeps working.
Chrome is a general-purpose browser designed for humans. Plasmate is purpose-built infrastructure for AI agents. The difference shows up in every metric that matters.
| Plasmate | Chrome / Playwright | Lightpanda | |
|---|---|---|---|
| Speed | 4ms/page | 252ms/page | 23ms/page |
| Memory (100 pages) | 30MB | 20GB | 2.4GB |
| Output | Structured JSON | Raw HTML | Raw HTML |
| Token reduction | 94% | 0% | 0% |
| License | Apache-2.0 | Chromium | AGPL |
| Self-hostable | Yes | Yes | Yes (AGPL) |
On licensing: The closest alternative (Lightpanda) uses AGPL, which requires you to open source any product that integrates it. Plasmate is Apache-2.0 with no such requirement. Use it however you want.
Plasmate is a single binary with no dependencies. Your team can evaluate it today without infrastructure changes.
Plasmate is built by David Hurley. Apache-2.0 licensed. All benchmark data is reproducible and publicly available.